Year-round – Over two-thirds of people with rhinitis suffer “perennial allergic rhinitis” year-round. This is often caused by an allergy to dust mites, pet dander, mold or other indoor allergens. Foods also sometimes cause perennial rhinitis.
Non-allergic rhinitis – People with non-allergic rhinitis tend to have symptoms that come and go throughout the year. Usually, symptoms are a stuffy and runny nose and postnasal drip. This type of rhinitis can be caused by:
This information has been provided by the American College of Allergy, Asthma and Immunology